Staple-forming machine.



PATENTED NOV 5, 1907.

STAPLE FORMING MACHINE.

APPLIGATIDN FILED MAY 23, 1706.

3 SHEETSSE(EET l.

. Q Wm an;

PATEIJT 'D NOV. 5 1907, W. G. LIBBIG. STAPLE FORMING MACHINE. APPLIGATIOH FILED angs, 1906.

3 SEEETS-SHBBT 24 EM 22 w7- 4 L11? No. 870,114. PATENTED NOV. 5, 1907.

W. G. LIBBIG. STAPLE FORMING MAGHINE. APPLIOATION FILED MAY 23, 1906.

3 SHEETS-SHEET 3.

entree @CEATEEd WILLIAM G. LlEBIG, OF DETROIT, MIGTII GAN.

STAPLE-EORMING MACHINE.

To all whom it mayto'ncem:

Be it known that I, Win/1AM G. LIEBIG, who am a citizen of the United States, residing at Betroit, county of Wayne, State of Michigan, have invented a certain new and useful Improvement in Staple-Forming Machines, and declare the following to be a full, clear, and exact description of the same, such as will ehahle others skilled in the art to which it pertains to make and use the same, reference being had to the'accom panying drawings, which form a part of this specification.

This invention relates to staple forming mechanism,

' and has for its object an improved machine especially adapted toform staples and furnish them in position to be driven in connection with, and as a part of, brush making machines.

The device of this application consists of the staple forming portion of a brush making machine, such as is illustrated in my co-pending application, Serial Number 302,965. Except for the pedelly operated clutch mechanism whereby the driving gear of the entire niachine is thrown into and out of operative connectionv with the source of power, the machine is wholly auto matic.

Inthe drawings: Figure 1, is a perspective of the entire machine, the pedal piece and the lowermost part of the base portion being omitted for the sake of economy oi space. Fig; 2, is a front elevation, partly in section, of the working parts of the machine, the

facing or cover piece 13 being removed so that the relation and position of the various slides, which it covers and assists in holdingin place, may be seen. Fig. 3, is a sectional elevation at right angles to that shown in Fig. 2, along the line :c2" in that figure, and looking toward the right as indicated by the arrows. Fig. 4, is a view of the staple former. Fig. 5, is a view of the slide bar whose reciprocation actuates the picker or brush carrier. Fig. 6, is a perspective of the anvil and its actuating device. Fig. 7, is a view from the regret the lever whose function it is to retract the anvil and feed the wire forward, and of its supporting slide. Fig.

8, is an elevation of the needle and its regulating feed roller, together with the slide bar which carries and actuates it. Fig. 9, is a sectional elevation of a device for regulating the tension of the Wire. Fig. 1 is a detail elevation of the wirccutting block. Figi. 1i is a plan view from beneath of the wire-cutting 1: embers. Fig. 12, is a detail elevation of the wire-cutting block with the movable knife piece removed therefrom.

A indicates the supporting or base portion of the machine, from which rises on overhanging arm B,' upon which most of the working parts of the mechanism are supported. The upper portion of the former is formed to constitute a bearing .l for the horizontal shalt S, from whichall of the working ports are actuated, and at one end of which is the driving wheel 12 which is actuated Specification of Letters Patent. Application filed May 538, 1908- Sorial No. 313.338.

- Ftttfinteti so... 5, rear.

on the treadle to a position of non-engagement with --thefshaft, is brought about by the upward pull oi a spring T, which is at t'aohed to a projecting-pert of the base piece, g Above the middle portion of the machine, two cam members G and. H are inounted on the shaft each face of each is provided with suitable cam tracks 0: races, whose contour and relative position, with respect to one another, has been made a matter of careful pre vious calculation. Into each of these cars jects an antifriction roller, as 51, which is mounted on a. pin at the upper end of vertical slide bar 50, which is contained in a proper race way in the arm portion B, and reaches downwardly to engaging position with the part 01' mechanism which it is particularly designed to actuate. The extreme right hand one of these slides 40 engages in the cam race it on the right hand face of the wheel G, and is actuated vertically as the wheel rotates by the engagement of its antifriction roller 40 in the cam race. From the lower end of the slide 40 projects a pivoted bracket 41, which carries a pawl 41; on each downuard stroke of the slide, this pawl engages with its lowermost point the teeth of a ratchet wheel 44, which is fixed to one face of the wire-advancing wheel 45, both of which are pivoted to one end or the lever 46. I I about its pivot pin '4, which extends into the body portion of the arm, and has its horizontal portion (that carrying the wheel 45) kept pressed firmly downwards by the pressure of the spring 4 against the upper end races pro-' The lever 46 moves of its vertical portion; the spring 4 is regulated as to its I pressure by a nut 47, whose bolt rests against the fixed lug 47. The periphery of the p hel 45 is serrated so as to frictionally engage the wire 18, which. is u ncoiied from the spool 19, and passes between its periphery and the smaller serrated wheel 4 8, on its way to'the staple forming mechanism, the pressure ofthe spring 4 making theengagen eut of the periphery of the wheel a very positive the. The diameter of the'wheel is made a matterof very careful previous calculation,

proportionate to the size of wire used, in order tho-teach throw of the wheel caused by the engagement ofthe pawl 41 against the ratchet -14 theexact lengthof-wire The greater the size of the I desired maybe advanced. wheel 45 the greater is the length orleach advancement of wire, since the size in degrees or the are through which the wheel turns each stroke is the same. The return or the pawl piece 41 to'a position or alimero s ment as near may be with thesliqielfi,;siter'sxtchj stroke against the ratchet, is provided for' by'the,

"means of theholloiv post Zxw'ith, a cross perforation for v the wim l8 and with'two plugs y and t. pressed against the'int rposed wire by a spring d whose tension is reguscrew (1. I have found it advisable to attach" tlie wire advancing elements to an actuating slide which is independent of, for instance, the needle carry ing slide 50, which carries the shearing block 62, since the jolting of this slide 50 due to theimpact of'th'e projection 25 on the arm 23 of the bristle carrier against the'proller 52'would tend to interfere with the exact timing of the wires advance by the movement of the serrated feed rollers. After passing through this ten sionfregulating device, and between the wheels 45 and 48, the wire passes on beyond theedge of the shear block 49 andinto the track wherein the staple forming slide and its shearing block 68 reciprocate. Thisstaple former is actuated similarly to the slide '40 by engagement of its antifriction roller 61 in the 'cam race 9 of the wheel G; as it descends, it engages the' exposed length of wire which has been projected.

across its path by the rotation of the wheels 45 and 48, shears it off from the rest of the length by engagement of its cutting face against the block 49, and continuing" on its way down, presses it over the projecting part 67 of the anvil 67, which projects from the rear of the machine through a suitable slot in the arm B', into the path of the shearingblock 68 during a portion of each cycle of its movements. The cavity in the block 68 into which the anvil 67 projects upon its forward movement is shown at 74 in Fig. 11f Its rear end is connected by means of a bolt with the slotted end of one arm 65 of a bell crank lever 65, which is heldin place by a screw or bolt 64, which. extends vertically therethrough, and through a lug p on the rear of the machinef The arm 66 of this bell crank lever has its free end shaped to engage in the oblique slot 4 2,which is in the rear face of the block 43, and which is liked to the lower end of the slide 40, whose downward movement causes the arm'66, engaging as it doesiri the oblique slot 42, to be moved to the left, thus causing the.

part 67 of the anvil to be projected into the path of the staple former 60, as hereinabove described. Similarly the upward or retractile movement of this slide 40 causes the arm 66 to move toward the left, thus caus-' ing the retractile movement of the anvil 67, after its function (the formation of the staple over the part 67) has been accomplished. The positioning of the cam races u and g on the two faces of the wheel G determines the exact timing desired of these two parts.

, The wire cutting block 68 may be a single and solid piece of the desired shape or it may take the form illustrated in Figs. 10, 11, and 12. In this case theoblique cutting edge of the block 49 engages across a correspondingly beveled corner of the block in shearing p0 v sition with respect to the cutting edge 71 of the'adjustablc shearing knife 70, which engages in a comple mentary channeled portion 69 of the block, the radii of the knife piece and of the channeled portion being the same. The exact positioning of the knife 70 is regulatcd by the'cngagcment of a pin through any desired one of the holes 70 in the knife and into the hole 70 in the channeled portion, this positioning being thereafter rendered more positive and rigid with respect to the body of theblock by the tightening of the screws 72. Theknife may thus be advanced; as its cutting edge wears by moving the securing pin from one hole 70 to another until 'it' i's'nearly used up .by gradual grinding off; another fresh knife may'then besubsti tuted without discarding the cutting block-as a whole.

"" lis shown particularly in Fig. 11 the shearing edge of the block 49, and the complementary edge of the shearing block 168 whichis carried bystaple-forming' slide 60 are somewhatoblique to theline 'of the wire as it advancesacross the front of the machine, so that as the wire is sheared by their edges, it is not given a straight out, but is sliced off at an angle so, that the points of the staple formed by the ends of the piece of wire cut off are pointed, M

. Next adjacent to the staple former 60 is the needlecarrying slide 50, similarly actuated by engagement of its antifriction roller 51in the cam race k in the face of the wheel H. Its depression is brought about just at the time when the tuft of bristles gathered by the carrier member 29 has been located at its point of (16- posit, and at the pointwhere the newly formed staple, is to be'located over and about it; The roller 52 carried on the face of this slide engages the inclined projection 25 on the upper arm 23 of the carrier 29, and

then engages forcibly against the projection 26 thereon,

both of which jolts cause the bristles to be shaken out of the notch which they have-been assembled and deposited in position to be driven downward, together with the staple. The needle 54, carried by the slide 50 now comes down upon the top of the staple, through the longitudinal slot 68 in the block 68 and drives it,

'with' the 'tuft which it incloses, down through the delivery lips m, and into the brush back.

On the lower portion of the knifecarrying slide 50 is an eccentric wheel 53, part of whose periphery is notched, while the remainder is regularly circular; against its lowermost portion the upper end of the staple driving needle 54 engages. In case the extreme lower portion of the staple driving needle 54 is broken I off, as frequently happens, the substitution of a new needle may be avoided by moving the eccentric piece 53 around, so that a higher, if not" the highest, portion of the periphery (that farthest from the-pivot 53" which holds it in place) engages against the end, thus forcing it down so much farther on the slide 50.

Within the camv race h on the left hand or outer face of the wheel H (viewed from the front of the machine) engages the 'antifriction roller 57, which is carried by slide 57. its vertical reciprocation, in response to the following of the cam track ,with the antifriction roller 57 actuates and causes the oscillation of the pivoted carrier. 29 about the fixed pin n, because of the engagement of a projecting stud in the rear face of the carrier 29 in the grooved cross head 56 at the lower end of the slide, v

or carrier actuator 57. The reciprocation of the peripheraledge of the carrier 29 against the accumulated store of bristles :ontaincd by the food box F, and which are constantly fed forward against the periphery of'the carrier by the pressure of the follower 36 against the contained mass of bristles (bccause of the tcnsion of the y weighted cord, 36 against its outer end), need not be further describedherc, as the brush making feature of or ,1 is as is immediately below the depending portion m of the staple forming mechanism. Its height and proizimity thereto is regulated by the supporting SCIGW l5, and its i angularity, with respect to the tutt inserting UlC('hifl ism, whether perpendicular or otherwise, is determilled-J3) the arm 16, which is pivoted to its lower face and regulated as to its height. by the thumb screw i6. What I claim is:-

1. In a. staple forming mechanism, the combination of wire gripping and advancing means, means for cutting the wire lntolengths of the desired size, comprising a fixed block having an exposed shearing face and a vertically reciprocating shearing block adapted -to I engage thereng'galnst and to subsequently,participate in the formation of the staple, an anvil controlled as to its movements by said wire advancing means and adapted to be projected thereby into the path of the reciprocating block during a portion of each cycle of operations; and means engaging through said reciprocating biock'and Cerivipg its actuation indc pendently of the other elements. adapted to'be. actuated against the head of the ticwly formed staple and to do (st-end a specific distance with said block, and thereafter: \vliunsaid block has ceased its descent, to drive the staple by further downwmd presure thereupon, substantially described.

2. 'In the staple forming mechanism of a brush making machine, in combination with means for feeding toward a specific length of Wire at each cycle of operations, a fixed olock beyond whose shearing edgethe length of wire is 'projccted, a reciprocating block adapted to sever said lengthof wire by shearing engagement with respect to said fixed block, an anvil member projected by the movement of said wire-advancing means into' the path of travel of said 1' 'ipl'ocnting blockhelow the pointot shearlngof the wire, 'odupted to cooperate with said reciprocating block in bendin: thewire' to staple form, and a driving needle engaging through said reciprocating block, though deriving its actuation independently thereof, said needle moving with said reciprocating block during ,a portion of each cycle 0t operations, and thereafter by continued downward movemont forcing the staple from the reciprocating block and ham a brush back, substantially as described.

.i. A' staple forming mechanism, having in combination with an anvil member, 'means for feeding forward a predetermined length, of Wire, said means actuating by its movement said anvil, a portion of which is connected therewith, wire cutting means a part of which is adapted to participate in the bending of the staple after the desired length of wire has been severed; and a driving needle adapted to engage the staple when formed and to drive within a vertical path of trztveL-said slide-being provided the some free from the cutting and forming means, subwith :1 groove along' a portion of its length wherelnsaid 'ucedle engages. and on ecccntricaily pivoted whcel'ttross .the upper end of the needle, 3 portion of the periphery of said wheel being smooth and a portion being serrated, and being. adapted to regulate the degree'of projection of the needle from the slidebecause of said eccentricity of pivoting, substantially as described.

In testimony whereof, I sign'tbis specificationin the presence of two witnesses.

' WILLIAM G. LIEBIG;

Lor 's Lnn Huron,

WILLI M M. SW AN.

A li-messes 

